Years ago it wasn't an issue. A small group of women could get together, rent an incall, and go forth. A 1 bedroom in the West End was $1100 bucks a month. Today, that same places is $2300. Optimally you want an incall with ensuite laundry and a secure entrance. Get into a 2 or 3 bedroom and you're talking thousands of dollars a month. It's a difficult business because high traffic units attract attention & you've got malicious outsiders who want to fuck up your business. If you own the place it's a little easier, but than condo boards get in the way if they find out. It's a really challenging environment to manage in high rent areas like Vancouver. And many of the men want to be anonymous when they approach and buzz up. And you've got to balance appointments because many pooners don't want to run into each other. I've never understood why myself, but this is my normalized life so...
Even if we legalize the industry and had street level stores where you could see women (ala in The Netherlands) pooners would still be gunshy being seen entering it. Only a change in societal norms will make it socially acceptable.